Diaphragm pump



FIG. 1 is an isometric view showing the front top and left side of a diaphragm pump according to the present invention;

FIG. 2 is a front elevation view of a diaphragm pump according to the present invention;

FIG. 3 is a rear elevation view of a diaphragm pump according to the present invention;

FIG. 4 is a right elevation view of a diaphragm pump according to the present invention;

FIG. 5 is a left elevation view of a diaphragm pump according to the present invention;

FIG. 6 is a bottom view of a diaphragm pump according to the present invention; and,

FIG. 7 is a top view of a diaphragm pump according to the present invention. 

The ornamental design for a diaphragm pump, as shown and described. 